I am 18 and already balding what could it be?

Balding: Most common thing is male pattern balding. Did your father lose his hair at a young age?

Heredity is the: major cause of balding. Female-pattern baldness occurs as hair thins. Male-pattern baldness leads to bald spots & receding hairline. Other causes: Alopecia,Ringworm infection, scarring alopecia (from conditions like Lichen planus, Lupus & Sarcoidosis),hormonal changes (menopause, pregnancy, childbirth), thyroid imbalance, excess Vit. A intake, certain medications, trichotillomania & a significant